Memory; Dimms; Dimm Specifications; Populating Dimm Sockets - HP 280 G4 MT Maintenance And Service Manual

Memory

Description
Memory modules (DDR4-2666)
16-GB
8-GB
4-GB

DIMMs

The memory sockets on the system board can be populated with up to two industry-standard DIMMs. These
memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory support,
you can populate the system board with up to 16 GB of memory.

DIMM specifications

For proper system operation, the DIMMs must meet the following qualifications:
DIMM
Compliance
Pins
Support
Slots
Maximum Memory
HP offers upgrade memory for this computer and advises that the consumer purchase it to avoid compatibility
issues with unsupported third-party memory.

Populating DIMM sockets

There are two DIMM sockets on the system board, with two sockets per channel. The sockets are labeled XMM1
and XMM2. Socket XMM1 operates in memory channel A. Socket XMM2 operates in memory channel B.
The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on
how the DIMMs are installed.
NOTE: Single channel and unbalanced dual channel memory configurations will result in inferior graphics
performance.
● The system will operate in single channel mode if the DIMM sockets are populated in one channel only.
● The system will operate in a higher-performing dual channel mode if the total memory capacity of the
DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The technology and
device width can vary between the channels. For example, if Channel A is populated with two 1-GB DIMMs
and Channel B is populated with one 2-GB DIMM, the system will operate in dual channel mode.
22 Chapter 4 Removal and replacement procedures
1.2 volt DDR4-SDRAM DIMMs
unbuffered non-ECC PC3-12800 DDR3-1600 MHz-compliant
industry-standard 240-pin containing the mandatory Joint Electronic Device Engineering Council (JEDEC)
specification
support CAS latency 11 DDR3 1600 MHz (11-11-11 timing)
2
16 GB